Los Angeles Mayor Antonio Villaraigosa, right, faces reporters as Miami Mayor and President of the U.S. Conference of Mayors Manuel Diaz, left, looks on during a news conference at the Rhode Island Convention Center, in Providence, R.I. , during the annual U.S. Conference of Mayors meeting, Friday, June 12, 2009. AP Photo logo AP Photo 32 months ago

Los Angeles Mayor Antonio Villaraigosa, right, faces reporters as Miami Mayor and President of the U.S. Conference of Mayors Manuel Diaz, left, looks on during a news conference at the Rhode Island Convention Center, in Providence, R.I. , during the annual U.S. Conference of Mayors meeting, Friday, June 12, 2009.